When Nancy and her
family arrive in Kona, Hawaii, they are desperate for a fresh start.
Nancy's husband has cheated on her; they sleep in separate bedrooms and
their twin sons have been acting out, setting off illegal fireworks. But
Hawaii is paradise: they plant an orange tree in the yard; they share a
bed once again and Nancy resolves to make a happy life for herself. She
starts taking a yoga class and there she meets Ana, the charismatic
teacher. Ana has short, black hair, a warm smile, and a hard-won wisdom
that resonates deeply within Nancy. They are soon spending all their
time together, sharing dinners, relaxing in Ana's hot tub, driving
around Kona in the cute little car Ana helps Nancy buy. As Nancy grows
closer and closer to Ana, skipping family dinners and leaving the twins
to their own devices, she feels a happiness and understanding unlike
anything she's ever experienced, and she knows that she will do anything
Ana asks of her. - from Goodreads

This sounds like a really interesting story about relationships, but it seems like there could be something darker going on, too!